Which of the following is a benefit of using marine-grade wire?

Marine-grade wire is specifically designed to withstand harsh marine environments, making its resistance to corrosion and moisture one of its most significant benefits. In a marine setting, wires are frequently exposed to saltwater, humidity, and other elements that can cause deterioration in standard wires. The materials and coatings used in marine-grade wiring help prevent rust, corrosion, and degradation, ensuring a more reliable and durable electrical system aboard boats and ships.

The other choices address aspects that do not align with the primary purpose of marine-grade wire. While it is true that some marine-grade wires may have a higher current rating or greater flexibility depending on the specific type, these characteristics are not inherent to all marine-grade wire and are not the primary reason for its designation. Additionally, marine-grade wire is usually more expensive than standard wire due to the special materials and manufacturing processes required to ensure its durability and resistance in challenging marine environments. Thus, the primary advantage of marine-grade wire is undoubtedly its resistance to corrosion and moisture.